added a clashes command

[odeke-em]

Added ability to:

• List clashes.
• Fix clashes.

Listing clashes

$ drive clashes dup-tests/a/b/c/d/e
These paths clash
X /dup-tests/a/b/c/d/e/f 0By5qQkvRAeV2Wk9FaEN4ZzNock0
X /dup-tests/a/b/c/d/e/f/g 0By5qQkvRAeV2amN5aFgzc1htVXM
X /dup-tests/a/b/c/d/e/f/g 0By5qQkvRAeV2N21ETkVCTHpkcEE
X /dup-tests/a/b/c/d/e/f/g/h/i 0By5qQkvRAeV2TWdVb29DRlVXR1k
X /dup-tests/a/b/c/d/e/f/g/h/i 0By5qQkvRAeV2Vk9lY3Y2SjFDYlE
X /dup-tests/a/b/c/d/e/f 0By5qQkvRAeV2TzE3LXNWVFNoaHM
X /dup-tests/a/b/c/d/e/f 0By5qQkvRAeV2NmEwUmFQOEZ0dE0
X /dup-tests/a/b/c/d/e/f 0By5qQkvRAeV2bm5ZRVpELXRHTWM

Fixing clashes

$ drive clashes --fix [paths...]
$ drive clashes  --fix dup-tests/a/b/c/d/e
Some clashes found, we can fix them by following renames:
/dup-tests/a/b/c/d/e/f 0By5qQkvRAeV2TzE3LXNWVFNoaHM -> f_0
/dup-tests/a/b/c/d/e/f 0By5qQkvRAeV2NmEwUmFQOEZ0dE0 -> f_1
/dup-tests/a/b/c/d/e/f 0By5qQkvRAeV2bm5ZRVpELXRHTWM -> f_2
/dup-tests/a/b/c/d/e/f/g 0By5qQkvRAeV2N21ETkVCTHpkcEE -> g_0
/dup-tests/a/b/c/d/e/f/g/h/i 0By5qQkvRAeV2Vk9lY3Y2SjFDYlE -> i_0
Proceed with the changes [Y/N] ?